80 lines
2.5 KiB
Text
80 lines
2.5 KiB
Text
# Copyright 2015-2016 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# Test running a program that spawns enough threads that the tid of an
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# exited thread is reused. GDB should not crash when this happens.
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standard_testfile
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if {[prepare_for_testing "failed to prepare" $testfile $srcfile { debug pthreads }] == -1} {
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return -1
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}
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clean_restart ${binfile}
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if ![runto main] {
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fail "Can't run to main"
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return -1
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}
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delete_breakpoints
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# Avoid dumping a ton of thread create/exit info in the logs.
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gdb_test_no_output "set print thread-events off"
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gdb_breakpoint "after_count"
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gdb_continue_to_breakpoint "after_count"
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# Get value of VARIABLE in the inferior.
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proc getvar {variable} {
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global decimal
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global gdb_prompt
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set value 0
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set msg "get $variable"
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gdb_test_multiple "print $variable" $msg {
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-re " = ($decimal)\r\n$gdb_prompt $" {
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set value $expect_out(1,string)
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pass $msg
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}
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}
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return $value
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}
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set reuse_time [getvar "reuse_time"]
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# Now the real test. Run to a breakpoint in a thread that exits
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# immediately once resumed. The thread ends up left on the thread
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# list, marked exited (exactly because it's the selected thread).
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gdb_breakpoint "do_nothing_thread_func"
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gdb_continue_to_breakpoint "do_nothing_thread_func"
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delete_breakpoints
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# Let the program continue, constantly spawning short-lived threads
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# (one at a time). On some targets, after a bit, a new thread reuses
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# the tid of the old exited thread that we still have selected. GDB
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# should not crash in this situation. Of course, if the tid number
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# space is shared between all processes in the system (such as on
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# Linux), there's a chance that some other process grabs the TID, but
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# that can never cause a spurious test fail.
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gdb_breakpoint "after_reuse_time"
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# Higher than what the test program sleeps before exiting.
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set timeout [expr $reuse_time * 2]
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gdb_continue_to_breakpoint "after_reuse_time"
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